Business, 14.04.2020 18:57 santos200154

Chris would like to conduct a study on the effectiveness of a new substance-abuse treatment program. He has a sample of participants go through the program and he uses as a comparison group people who did not volunteer for the program but were eligible. Chris has used a(n) design for his study.

a. nonequivalent group
b. interrupted time-series
c. pretest-posttest control-group
d. Solomon four-group

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Chris would like to conduct a study on the effectiveness of a new substance-abuse treatment program....